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Vishay General Semiconductor - Diodes Division 1.5KE56CA-E3/54
- Part No.:
- 1.5KE56CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56CA-E3/54.pdf
- Description:
- TVS DIODE 47.8VWM 77VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,186
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Product details
Overview
1.5KE56CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 77.0 V at 19.5 A, and operates across –55 °C to +175 °C. It protects MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges in industrial and automotive systems.
For engineers reviewing the 1.5KE56CA-E3/54 datasheet, 1.5KE56CA-E3/54 pinout, 1.5KE56CA-E3/54 application, or 1.5KE56CA-E3/54 equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal derating curves, RoHS-compliant packaging (E3 suffix), and direct alternative options for circuit-level ESD/surge hardening.
Technical Context
This device uses a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
Rated for 1500 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, it sustains repetitive surges while maintaining stable VC ≤ 77.0 V at IPPM = 19.5 A. Thermal resistance is RθJL = 15.4 °C/W (junction-to-lead), supporting lead-mounted dissipation up to 6.5 W at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 47.8 V - maximum continuous working voltage before leakage exceeds 1.0 µA, setting safe operating margin |
| VC @ IPPM | 77.0 V at 19.5 A - actual clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity compatible with IEC 61000-4-5 Level 4 |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity in high-impedance sensor bias networks |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 molded epoxy body |
Pinout & Package
1.5KE56CA-E3/54 uses a two-terminal axial-leaded DO-201AD package (Case Style 1.5KE). Bidirectional construction means no polarity marking; both leads are electrically symmetric and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both) | Surge current path | Identical terminals conduct equally in either direction during overvoltage events; no cathode band marking required |
| Lead (each) | Thermal and electrical interface | Matte tin-plated, J-STD-002 solderable; RθJL = 15.4 °C/W enables direct PCB trace heat sinking |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%) and long-term reliability under humidity and thermal cycling |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 4 kV/2 Ω surge testing without degradation when properly mounted |
| Bidirectional symmetry | Eliminates need for polarity-aware placement in AC lines, transformer secondaries, or differential buses |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and JEDEC MSL-1 handling for automated assembly |
| –55 °C to +175 °C operation | Validated for engine control units, power inverters, and railway signaling where ambient extremes exceed 125 °C |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Primary shunt clamp placed upstream of DC-DC converters and microcontrollers to limit bus voltage to ≤77 V. Use Value: Prevents latch-up or gate oxide rupture in automotive-grade MCUs by clamping within 1 ns and sustaining 1500 W surges. |
Use Scenario: Shielding 4–20 mA current-loop transmitters and analog sensor outputs (e.g., pressure, temperature) from EFT and surge coupling. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair or between signal and ground to suppress common-mode transients. Use Value: Maintains <1 µA leakage at 47.8 V, avoiding offset errors in precision current loops while clamping ±77 V spikes. |
| Telecom Line Interface Protection | AC Motor Drive Control Signal Protection |
Use Scenario: Safeguarding RS-485/RS-232 transceivers on remote telecom nodes exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-line TVS connected line-to-line and line-to-ground to absorb longitudinal and transverse mode surges. Use Value: Symmetrical 53.2–58.8 V VBR ensures balanced clamping on full-duplex data lines without skew or distortion. |
Use Scenario: Protecting isolated gate drivers and feedback optocouplers in variable-frequency drives from IGBT switching noise and ground bounce. IC Role / Device Role / Timing Role: Clamp placed at isolated signal inputs to suppress fast-rising dv/dt transients coupled through parasitic capacitance. Use Value: Sub-ns response prevents false triggering of protection logic; 77.0 V clamping avoids exceeding driver IC absolute max ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA | DO-214AA package; lower PPPM = 600 W; VC = 93.6 V at 6.4 A; smaller footprint but higher clamping voltage | Preferred for space-constrained PCBs where 600 W surge margin suffices and thermal mass is limited | Select SMBJ58CA only if board area is critical and system-level surge testing validates 600 W capability. |
| 1.5SMC58CA | SMA package; same 1500 W rating; VBR = 53.2–58.8 V; VC = 93.6 V at 16.0 A; surface-mount, no axial leads | Suitable for automated SMT assembly; requires thermal relief pads to match 1.5KE's junction-to-lead conduction | Choose 1.5SMC58CA for reflow-soldered designs needing identical electrical specs but plan for enhanced pad copper area. |
Compared with 1.5KE56CA-E3/54, SMBJ58CA trades surge robustness for compactness, while 1.5SMC58CA retains full 1500 W capability in SMT form-neither offers drop-in replacement due to differing packages and thermal paths, requiring layout review for mechanical and thermal compliance.
Availability
1.5KE56CA-E3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, telecom line interface, and motor drive signal isolation requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE56CA-E3/54 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive environments.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing rugged packaging, wide temperature operation, and repeatable clamping performance under repetitive surge stress.
FAQ
What is the breakdown voltage tolerance for 1.5KE56CA-E3/54?
The 1.5KE56CA-E3/54 has a specified breakdown voltage range of 53.2 V to 58.8 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 56 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports reliable coordination with downstream overvoltage protection thresholds in the 1.5KE56CA-E3/54 application circuit.
Is 1.5KE56CA-E3/54 suitable for automotive AEC-Q101 qualification?
No-1.5KE56CA-E3/54 carries the commercial-grade E3 suffix and is not AEC-Q101 qualified. For automotive use, Vishay offers the HE3 variant (e.g., 1.5KE56CAHE3_B), which meets AEC-Q101 stress testing requirements. The 1.5KE56CA-E3/54 remains appropriate for industrial and telecom applications where extended temperature operation (–55 °C to +175 °C) is needed without formal automotive qualification.
How does the clamping voltage of 1.5KE56CA-E3/54 compare to its breakdown voltage?
The 1.5KE56CA-E3/54 clamps at 77.0 V when subjected to its rated peak pulse current of 19.5 A (10/1000 µs waveform), which is approximately 37% above its minimum breakdown voltage of 53.2 V. This VC/VBR ratio reflects low incremental surge resistance and confirms effective transient energy diversion without excessive voltage overshoot in the 1.5KE56CA-E3/54 protected circuit.
What is the maximum allowable reverse leakage current for 1.5KE56CA-E3/54 at its working voltage?
At its maximum steady-state reverse voltage of 47.8 V (VWM), the 1.5KE56CA-E3/54 exhibits ≤1.0 µA reverse leakage current. This ultra-low leakage preserves signal fidelity in high-impedance circuits such as sensor bias networks or precision reference dividers, ensuring minimal error contribution while maintaining robust surge immunity in the 1.5KE56CA-E3/54 design.
Can 1.5KE56CA-E3/54 be used in parallel to increase surge handling capacity?
Yes-multiple 1.5KE56CA-E3/54 devices can be paralleled to distribute surge current, but matching VBR (53.2–58.8 V) and thermal mounting conditions is essential to ensure current sharing. Uneven sharing may cause one device to absorb disproportionate energy; therefore, parallel use requires careful layout, equal trace lengths, and shared heatsinking to maintain reliability in the 1.5KE56CA-E3/54 implementation.
1.5KE56CA-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE56CA-E3/54 FAQ
1.How can I place an order for 1.5KE56CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56CA-E3/54 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5KE56CA-E3/54 reliable?
The price and inventory of 1.5KE56CA-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE56CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56CA-E3/54?
1.5KE56CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56CA-E3/54 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5KE56CA-E3/54?
For technical support, including 1.5KE56CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE56CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56CA-E3/54 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5KE56CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE56CA-E3/54?
All 1.5KE56CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56CA-E3/54, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5KE56CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE56CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56CA-E3/54 Tags
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